Senate Democrats moved quickly to kill a House-passed short-term spending bill to keep the government running past September 30th.
Lawmakers are scheduled to be in recess next week.
The Republican-led House and Democratic-led Senate have deep disagreements over levels of spending cuts and the allocation of additional disaster aid after an unprecedented year of tornadoes, floods and fires.
In a Capitol news conference, GOP House Speaker John Boehner put the burden of disaster aid on Senate Dems.
He said FEMA disaster aid money could run out as early as Monday.
This week, Senate Majority Leader Harry Reid accused Tea Party-led conservatives of playing politics with needed disaster relief.
The House bill keeps the government operating through November 18th, while providing more than three-and-a-half billion dollars in additional disaster aid.
Senate Democrats have already approved a larger disaster relief allocation.
Democrat Reid calls the House figure inadequate.